FilterOperation* FilterInterpolationFunctions::createFilter(
const InterpolableValue& interpolableValue,
const NonInterpolableValue& untypedNonInterpolableValue,
const StyleResolverState& state) {
const FilterNonInterpolableValue& nonInterpolableValue =
toFilterNonInterpolableValue(untypedNonInterpolableValue);
FilterOperation::OperationType type = nonInterpolableValue.type();
switch (type) {
case FilterOperation::GRAYSCALE:
case FilterOperation::HUE_ROTATE:
case FilterOperation::SATURATE:
case FilterOperation::SEPIA: {
double value =
clampParameter(toInterpolableNumber(interpolableValue).value(), type);
return BasicColorMatrixFilterOperation::create(value, type);
}
case FilterOperation::BRIGHTNESS:
case FilterOperation::CONTRAST:
case FilterOperation::INVERT:
case FilterOperation::OPACITY: {
double value =
clampParameter(toInterpolableNumber(interpolableValue).value(), type);
return BasicComponentTransferFilterOperation::create(value, type);
}
case FilterOperation::BLUR: {
Length stdDeviation = LengthInterpolationFunctions::createLength(
interpolableValue, nonInterpolableValue.typeNonInterpolableValue(),
state.cssToLengthConversionData(), ValueRangeNonNegative);
return BlurFilterOperation::create(stdDeviation);
}
case FilterOperation::DROP_SHADOW: {
ShadowData shadowData = ShadowInterpolationFunctions::createShadowData(
interpolableValue, nonInterpolableValue.typeNonInterpolableValue(),
state);
Color color = shadowData.color().isCurrentColor()
? Color::black
: shadowData.color().getColor();
return DropShadowFilterOperation::create(
IntPoint(shadowData.x(), shadowData.y()), shadowData.blur(), color);
}
default:
NOTREACHED();
return nullptr;
}
}
ShadowData ShadowData::blend(const ShadowData& from, double progress, const Color& currentColor) const
{
ASSERT(style() == from.style());
return ShadowData(blink::blend(from.location(), location(), progress),
clampTo(blink::blend(from.blur(), blur(), progress), 0.0f),
blink::blend(from.spread(), spread(), progress),
style(),
blink::blend(from.color().resolve(currentColor), color().resolve(currentColor), progress));
}
ShadowData ShadowData::blend(const ShadowData& from, double progress) const
{
if (style() != from.style())
return *this;
return ShadowData(WebCore::blend(from.location(), location(), progress),
clampTo<int>(WebCore::blend(from.blur(), blur(), progress), 0),
WebCore::blend(from.spread(), spread(), progress),
style(),
WebCore::blend(from.color(), color(), progress));
}